Nilfisk SR 1450 B Manuel D'utilisation page 101

Motor overheating (SR 1450 B)
CAUSE
Overload
Insuffi cient air fl ow
Wrong voltage
Bearings
Winding heating
Commutator heating
CHECK
Current to the motor
Check suction/delivery openings
Fan rotation
Low battery voltage
Low voltage to motor terminals
Faulty or badly installed bearing
Radial overload
Dirt infi ltration
Armature with shorted blackened winding
High humidity
Shorted coil or winding, blackened insulating
material
Loose inner connection
Short-circuit between segments
Poor contact or worn carbon brushes
Improper carbon brush quality
Excessive spring pressure
Dirty or damaged surface
SR 1450 B-D
USER MANUAL
Subject the motor to less strain
Clean or change shields or caps
Replace fan
Recharge batteries
Check connections for proper tightening
Change bearings or change at every repair
operation
Check stress and strain
Clean the motor inside
Replace. Use only original spares. Do not
rewind.
Clean and dry at 110 °C
Replace. Use only original spares.
Check and tighten correctly
Clean commutator and contact the manufacturer
Check or replace
Only original carbon brush and for 48 V voltages
Recalibrate or change
Clean or rectify the commutator
33014811(3)2010-03 A
ENGLISH
REMEDY
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